Dumping-car.



R. H. STEVENS. DUMPI NG CAR.

APPLICATION FILED SEPT. 2,1913.

1 ,1 1 8,378, Patented Nov. 24, 1914.

4 SHEETS-SHEET1.

/T v a i i i i i w i s N I h i 5 k- I m wrmzsszs INVENTOR R. H. STEVENS.

DUMPING CAR.

APPLICATION FILED SEPT. 2,1913.

Patented Nov. 24, 1914.

4 SHEETS-SHEET 3.

I W QZQF WITNESSES R. H. STEVENS.

DUMPING CAR.

APPLIGATION FILED SEPT. 2,1913.

1, 1 18,378. Patented Nov. 24, 1914.

4 SHEETS-SHEET 4.

WITNESSE$ INVENTOR 0; 5 QE M 44/47/244 ,4; 6M WMLM UNIED STATES OFFICE.

RICHARD H. STEVENS, OF MUNHALL, PENNSYLVANIA, ASSIGNOR OF ONE-HALF TO PER TORSTEN BERG, OF STOCKHOLM, SWEDEN.

DUMPING-GAR.

Specification of Letters Patent.

Patented Nov. 24, 19141.

Application filed September 2, 1913. Serial No. 787,597.

To all whom it may concern:

Be it known that I, RICHARD H. STEVENS, a citizen of the United States, residing at Munhall, Allegheny county, Pennsylvania,

have invented a new and useful Improvement in Dumping'Cars, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification,

in which Figure 1 is an end view partially in section of a portion of a dumping ladle car constructed in accordance with my invention. Fig. 2 is a sectional view on the line IIII of Fig. 4, showing a portion of the controlling mechanism. Fig. 3 is a similar view showing the parts in a shifted position. Fig. 4 is a sectional view on the line IV-IV of Fig. 3. Fig. 5 is a view similar to Fig. 1 showing a modified form of controlling mechanism. Fig. 6 is a detail end view of the rack of the controlling mechanism, and Fig. 7 is a sectional view on the line VII-VII of Fig. 5.

2,5 My invention relates to dumping cars,

more particularly dumping ladle cars employed in handling and transporting molten materials such as iron or blast furnace, slag or cinder, and which are tipped or tilted when being dumped of their contents.

The main object of my invention is to provided an improved device for controlling the dumping movement of the ladle.

By the use of my invention a slow dum ing movement may be imparted to the lad e.

At the end of the movement, a rapid oscillating motion may be imparted to strike the ladle forcibly on the frame of the car to dislodge the'skull.

M The precise nature of my inventionwill be best understood by reference to the accompanying drawings which will now be described, it being premised, however, that various changes may be made in the details of construction and general arrangement of the parts without departing from the spirit and scope of my invention, as defined in the appended claims.

In the drawings, the numeral 2 designates a ladle or cinder pot of a cinder car, secured in place in the usual trunnion rin forming part of the trunnions 3, by which t e ladle is mounted upon the frame 4 of the car. The trunnions 3 are each provided with a trunnion gear 5 having teeth meshing with sirni lar gear teeth on the trunnion gear racks 6. One of the trunnion gears 5 is provided with lugs 7 7 to one of which one end of a link is connected. This link 8 is pivotally connected at its central portion to a crosshead '60 9, as indicated at 10.

11 is a piston rod connected to the crosshead 9 at the one end, the other end being provided with a piston 12 within a cylinder 13.

14 are the actuating connections for the cylinder 13 which are controlled by means of a valve mechanism, indicated at 15.

When the parts are connected as indicated in Fig. 1, the piston is moved to the right to dump the ladle which is rocked b means of the various connections in the irection indicated by the arrow. If it is desired to dump the ladle in the reverse direction, the link 8 is disconnected from the lug 7 and 76 the piston 12 is moved to the other end of the cylinder. The opposite end of this link 8 is then connected to the lug'7, so that the ladle will be dumped when the piston is moved to the left and returned to its upright 80 position when moved to the right.

All of the foregoing mechanism is old and well known to the art and forms no part of my invention.

Journaled in the supportin frame of the dumping mechanism is a shaft 16, and connected to this shaft is a gear wheel 17 which is in mesh with the teeth of a rack 18 connected to the cross-head so as to reciprocate therewith.

19 is a skew gear connected to the shaft 16 and in mesh with a skew gear 20 on a shaft 21 journaled in a frame or casing 22. Surrounding the shaft 21 between the skew gear 20 and the casing 22 are springs 23, 23.

The mechanisms in Figs. 1 and 2 are in the positions to which they have been brought when the ladle'was moved to its upright position after the last dumping action. When it is desired to dump the ladle, pressure is admitted into the left hand end of the cylinder 13 to move the piston to the right, and during the first movement of the piston the skew gear 20 will be moved to the left and compress the spring 23 in the left hand side of the casing 22. As soon as the resistance of the spring is greater than the frictional engagement between the gears 19 and 20, the gear 20 will no rotate and act as a brake during the dumping movement. When the ladle has moved its full extent so that'itengag'es' the usual stop at the end of its movement, pressure to the left hand end of the c linder is cut e dislodged,

the ladle downwardly very rapidly'so that it will strike the ladle stop a sharp blow before the brake is brought into action to dislodge the skull. 'Ihe length of this rapid movement may be varied by changing the length ofthe lost motion between the springs and the gear 20. By varying the pitch of the gears 17 .and 20 as well as the size of the springs, the speed of the dum ing action can be changed. It will readi y be understood by'those familiar with the art that the strength bf'the springs as well as the angle of the gears 17 and 20 must be varied in accordance with the load to be handled, and in accordance with the speed at which the load is to be moved.

In Figs, 5 to 7, I have shown a modified form'of frictional controlling mechanismin which I have applied the same reference numerals to similar parts. In this construction I mount a worm-wheel 24: in bearings on the cross-head 9.- This worm-wheel is arranged to rotate within thesebearings and is also permitted to reciprocate a. predetermined distance as hereinafter described. Extending upwardly from the car frame are uprights 25 at each side of the car and at one end thereof. Mounted in each of these uprights are pins 26, and 2'1 is a worm-rack which is arranged to reciprocate on these pins and which is also in mesh with the worm 24C. Surrounding these pins and interposed between the ends of the worm rack and uprights 25 are springs '28 which perform the same funct1on as the springs 23, 23 in the structure previously described. In this construction the cross-head 9 can move to the right until the lost motion is taken up between the points (1-0 and as soon as thls lost motion is taken up the springs at therighthand end will be compressed until. their resist. ance is equal tothe frictional resistance between the worm and its rack. As soon as this resistance. is reached the worm will be rotated and act as a brake during the dumping movement. I

The advantages of m ,invention result from the provislon of a rictional brake for controllin the speed during the dumping action, and which is arranged to permit the mechanism to move freely in the reverse miners direction a predetermined distance and then move forward the same distance without the brake acting to resist the movement.

' I claim:

1. Adumping car, a motor geared to said car to efiect the dumping movement thereof, anautomatic brake device for controlling the movement of the motor, and means for permitting the motor to reverseand then move forward a predetermined distance at any point of the dumping movement without bringing the braking device into action; substantially as described.

2-. A dumping car, a motor geared to said car to effect the dumping movement thereof, a resilient braking device for controlling the movement of the motor during the dumping, and means for permitting the motor to reverse and then move forward a predetermined distance at any point of the dumping movement without bringing the braking device'into action; substantially as described.

3. A dumping car having a motorgeared 50 thereto to eflect the dumping movements thereof, a brake device comprising a rotary friction member for controlling the dumping movement, and means for permitting said rotary device to move longitudinally a predetermined distance to permit the motor to move a-slight-distance without bringing the" brakedevice into action; substantially as described.

4. In a dumping car, an actuating motor, actuating connections between the car and the motor to effect the dumping movements thereof, and frictional gearing-in said actuatingiconnections, said frictional gearing being arranged to permit the actuating connections to move a slight distance before the frictional gearing is brought into operation; substantially as described.

5. A dumping car having a ladle pivoted thereto, an actuating motor for dumping said ladle, actuatin cbnnections between the mot r and the la lo, and frictional gearing in said actuating connections, said frictional gearing being arranged to ermit the motor to move a slight distance efore the frictional gearing is actuated; substantially as described.

'6. A dumping'car having a ladle ivoted thereto, a motor for dumping sai ladle, actuating-connections between the ladle and the motor, skew gears in said actuating connections, and means, for permitting one of said gears to move longitudinallyapredetermined distance before it is rotated; substantially as described.

7. A dumping car having a ladle pivoted thereto, a. motor for dumping said ladle, actuating connections between he ladle and the motor, skew gears in said actuating con-- termined distance before it is rotated, together with yielding means at each end of the reciprocating skew gear; substantially as described. a

8. A dumping car having a tiltable ladle, and a motor for actuating the ladle, and

actuating connections between the motor and matic brake device having frictional sur-' faces in engagement witheach other for controlling the dumping movement; substan-' tially as described.

11. A dumping car, a resilient friction brake for controlling the dumping movement, a motor geared to 'said car to effect the dumping movement thereof, and means for permitting the motor to move a predetermined distance backward and then forward at the end of the dumping movement independent of the brake device; substantially as described.

12. In a dumping car, a motor for the dumping movement thereof, a brake device for controlling the dumping movement, and means for permitting the motor to reverse and then move forward a predetermined distance at any point in the dumpinglnovement without bringing the brake device into action; substantially as described.

13. A dumping car, a motor to effect the dumping movement thereof, a brake device having frictional surfaces in engagement with each other for controlling the dumping movement and means for permitting the motor to move a predetermined distance without bringin the brake device into action; substantially as described.

14. A dumping car, a motor to effect the dumping movement-thereof, an automatic brake device having frictional surfaces in engagement with each other for controlling the dumping movement and means for permitting the motor to move a predetermined distance without bringing the brake device into action; substantially as described.

15. A dumping car, a motor to effect the dumping movement thereof, a resilient brake device having frictional surfaces in engagement with each other for controlling the dumping movement and means for permitting the motor to move a predetermined distance without bringing the brake device into action; substantially as described.

16. A dumping car having a motor to effeet the dumping movements thereof, a brake comprising a plurality of members having frictional surfaces arranged to engage each other for controlling the dumping movement, one of said members being arranged to move longitudinally a pre etermined distance before its frictional surface is brought into engagement with the frictional surface of the other member to permit the motor to move a slight distance without bringing the brake into action; substantially as described.

In testimony whereof, I have hereunto set my hand.

RICHARD H. STEVENS. Witnesses:

J.=A. HENRY, K. MoL. LEAN. 

